How to achieve waterfall collection view in xamarin forms?

Question

GOAL: To achieve a waterfall collection view in xamarin forms.

Tried: I've achieved this in android using a custom renderer (staggered layout). Unfortunately, ios didn't provide a layout like this.

Referred this link https://github.com/xamarin/ios-samples/tree/master/ios9/CollectionView

But don't know to implement it in xamarin forms.Please help me for this.